Tirek is dead, but not everything is as it seems in the aftermath.

The Atlanteans, the Equestrians, and their allies unite to make their last stand against Tirek upon his return from exile.

Time runs out for all existence as Tirek emerges from oblivion to resume his eons-old vendetta against the Shepherd and her allies.

Rainbow Dash finds herself on a beach with no idea of how she got there, or how she'll go home.